I had trouble with my VAT system this week and it would not let my car start. (I guess it works! lol) Anyways the problem was that a wire had broke inside the ignition cylinder so it wasn't reading the pellet on the key. This can be an expensive fix. You can bypass it if you have the right resistor and plug it into the harness. Just thought I would share this info with you guys in case any of you experience the same trouble!